Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.129 Safari/537.36
Chrome 81
Windows
Desktop
4 years ago
Test name Executions per second
substring 48809524.0 Ops/sec
replace 6737930.0 Ops/sec
Tests:
  • substring

    AخA
     
    const a = "Omnipotent";
    const pos = 3;
    "<strong>" + a.substring(0, pos) + "</strong>" + a.substring(pos);
  • replace

     
    const a = "Omnipotent";
    const sub = "Omn"
    a.replace(sub, "<strong>" + sub + "</strong>");